The analysis of functioning efficiency of the multiple parameter system

It is necessary to consider a set of structurally interconnected and functionally cooperating polytypic systems for estimation of functioning efficiency of the boring rig. In these conditions the difficult system is formed at interaction of all systems of the boring rig intended for boring, and rock. If to consider the boring ring, the greatest influence on the process has the feed force and rotation frequency of movable operating element, as well as the structure and properties of materials of the drilling tool. If to consider the rock massif, the most important are strength characteristics which can be registered through the boreability indicator, as well as the structure of the rock massif. The definition technique of a roller bit firmness and speed of boring depending on strength properties and structure of the rock massif is developed. The presented technique allows to analyse a ratio of productivity of the boring rig of roller-bit drilling and a resource of a drill bit when boring the rock, being characterized with various indicators of boreability, quantity and the size of crevices and beds of the rock with various physical and mechanical properties.